3,989 research outputs found
Foreword: The Ediacaran-early Palaeozoic Cadomian zircon province fringing Northwest Gondwana
A nested decision tree for event detection in smart grids
Procedings of: 20th International Conference on Renewable Energies and Power Quality (ICREPQ'22), 27-29 July 2022, Vigo, Spain.Digitalization process experienced by traditional power networks
towards smart grids extend the challenges faced by power grid
operators to the field of cybersecurity. False data injection attacks,
one of the most common cyberattacks in smart grids, could lead
the power grid to sabotage itself. In this paper, an event detection
algorithm for cyberattack in smart grids is developed based on a
decision tree. In order to find the most accurate algorithm, two
different decision trees with two different goals have been trained:
one classifies the status of the network, corresponding to an event,
and the other will classify the location where the event is detected.
To train the decision trees, a dataset made by co-simulating a
power network and a communication network has been used. The
decision trees are going to be compared in different settings by
changing the division criteria, the dataset used to train them and
the misclassification cost. After looking at their performance
independently, the best way to combine them into a single
algorithm is presented.This research was funded by Fundación Iberdrola España, within the 2020 research support scholarship program
Birth and demise of the Rheic Ocean magmatic arc(s): Combined U–Pb and Hf isotope analyses in detrital zircon from SW Iberia siliciclastic strata
Paleozoic continental reconstructions indicate that subduction of Rheic oceanic lithosphere led to collision be-
tween Laurussia and Gondwanawhich was a major event in the formation of the Ouachita-Appalachian-Variscan
orogenic belt and the amalgamation of Pangea. However, arc systems which record Rheic Ocean subduction are
poorly preserved. The preservation of Devonian detrital zircon in Late Devonian–Early Carboniferous siliciclastic
rocks ofSWIberia, rather than arc-related igneous rocks indicates that direct evidence of the arc systemmay have
been largely destroyed by erosion. Herewe report in-situ detrital zircon U–Pb isotopic analyses of Late Devonian–
Early Carboniferous siliciclastic rocks fromthe Pulo do Lobo Zone,which is a reworked Late Paleozoic suture zone
located between Laurussia and Gondwana. Detrital zircon age spectra from the Pulo do Lobo Zone Frasnian
formations show striking similarities, revealing a wide range of ages dominated by Neoproterozoic and
Paleoproterozoic grains sourced fromrocks typical of peri-Gondwanan terranes, such as Avalonia, theMeguma ter-
rane and theOssa-Morena Zone. Pulo do Lobo rocks also include representative populations ofMesoproterozoic and
Early Silurian zircons that are typical of Avalonia and the Meguma terrane which are absent in the Ossa-Morena
Zone. The Famennian–Tournaisian formations from the Pulo do Lobo Zone, however, contain more abundant
Middle–Late Devonian zircon indicating the contribution from a previously unrecognized source probably related
to the Rheic Ocean magmatic arc(s). The Middle–Late Devonian to Early Carboniferous zircon ages from the
siliciclastic rocks of SW Iberia (South Portuguese, Pulo do Lobo and Ossa-Morena zones) have a wide range in
!HfT values (−8.2 to +8.3) indicating the likely crystallization from magmas formed in a convergent setting. The
missing Rheic Ocean arc was probably built on a Meguma/Avalonia type basement. We propose for the Pulo do
Lobo Zone that the Frasnian sedimentation occurred through the opening of a back-arc basin formed along the
Laurussian active margin during Rheic Ocean subduction, as has been recently proposed for the Rhenohercynian
Zone in Central Europe. Detrital zircon ages in the Frasnian siliciclastic rocks indicate provenance in the Meguma
terrane, Avalonia and Devonian Rheic Ocean arc(s). As a result of back-arc basin inversion, the Frasnian formations
underwent deformation, metamorphism and denudation and were unconformably overlain by Famennian
to Visean siliciclastic strata (including the Phyllite-Quartzite Formation of the South Portuguese Zone). The Latest
Devonian–Early Carboniferous detritus were probably shed to the Pulo do Lobo Zone (Represa and Santa Iria
formations) by recycling of Devonian siliciclastic rocks, from the South Portuguese Zone (Meguma terrane)
and from a new distinct source with Baltica/Laurentia derivation (preserved in the Horta da Torre Formation and
Alajar Mélange)
A system of three transiting super-Earths in a cool dwarf star
We present the detection of three super-Earths transiting the cool star
LP415-17, monitored by K2 mission in its 13th campaign. High resolution spectra
obtained with HARPS-N/TNG showed that the star is a mid-late K dwarf. Using
spectral synthesis models we infer its effective temperature, surface gravity
and metallicity and subse- quently determined from evolutionary models a
stellar radius of 0.58 R Sun. The planets have radii of 1.8, 2.6 and 1.9 R
Earth and orbital periods of 6.34, 13.85 and 40.72 days. High resolution images
discard any significant contamination by an intervening star in the line of
sight. The orbit of the furthest planet has radius of 0.18 AU, close to the
inner edge of the habitable zone. The system is suitable to improve our
understanding of formation and dynamical evolution of super-Earth systems in
the rocky - gaseous threshold, their atmospheres, internal structure,
composition and interactions with host stars.Comment: Accepted for publication in MNRAS Letter
The anisotropy of granular materials
The effect of the anisotropy on the elastoplastic response of two dimensional
packed samples of polygons is investigated here, using molecular dynamics
simulation. We show a correlation between fabric coefficients, characterizing
the anisotropy of the granular skeleton, and the anisotropy of the elastic
response. We also study the anisotropy induced by shearing on the subnetwork of
the sliding contacts. This anisotropy provides an explanation to some features
of the plastic deformation of granular media.Comment: Submitted to PR
Developing a tool for mapping adult mental health care provision in Europe: the REMAST research protocol and its contribution to better integrated care
Introduction: Mental health care is a critical area to better understand integrated care and to pilot the different components of the integrated care model. However, there is an urgent need for better tools to compare and understand the context of integrated mental health care in Europe.
Method: The REMAST tool (REFINEMENT MApping Services Tool) combines a series of standardised health service research instruments and geographical information systems (GIS) to develop local atlases of mental health care from the perspective of horizontal and vertical integrated care. It contains five main sections: (a) Population Data; (b) the Verona Socio-economic Status (SES) Index; (c) the Mental Health System Checklist; (d) the Mental Health Services Inventory using the DESDE-LTC instrument; and (e) Geographical Data.
Expected results: The REMAST tool facilitates context analysis in mental health by providing the comparative rates of mental health service provision according to the availability of main types of care; care placement capacity; workforce capacity; and geographical accessibility to services in the local areas in eight study areas in Austria, England, Finland, France, Italy, Norway, Romania and Spain.
Discussion: The outcomes of this project will facilitate cooperative work and knowledge transfer on mental health care to the different agencies involved in mental health planning and provision. This project would improve the information to users and society on the available resources for mental health care and system thinking at the local level by the different stakeholders. The techniques used in this project and the knowledge generated could eventually be transferred to the mapping of other fields of integrated care
Experience and Challenges from Clinical Trials with Malaria Vaccines in Africa.
Malaria vaccines are considered amongst the most important modalities for potential elimination of malaria disease and transmission. Research and development in this field has been an area of intense effort by many groups over the last few decades. Despite this, there is currently no licensed malaria vaccine. Researchers, clinical trialists and vaccine developers have been working on many approached to make malaria vaccine available.African research institutions have developed and demonstrated a great capacity to undertake clinical trials in accordance to the International Conference on Harmonization-Good Clinical Practice (ICH-GCP) standards in the last decade; particularly in the field of malaria vaccines and anti-malarial drugs. This capacity is a result of networking among African scientists in collaboration with other partners; this has traversed both clinical trials and malaria control programmes as part of the Global Malaria Action Plan (GMAP). GMAP outlined and support global strategies toward the elimination and eradication of malaria in many areas, translating in reduction in public health burden, especially for African children. In the sub-Saharan region the capacity to undertake more clinical trials remains small in comparison to the actual need.However, sustainability of the already developed capacity is essential and crucial for the evaluation of different interventions and diagnostic tools/strategies for other diseases like TB, HIV, neglected tropical diseases and non-communicable diseases. There is urgent need for innovative mechanisms for the sustainability and expansion of the capacity in clinical trials in sub-Saharan Africa as the catalyst for health improvement and maintained
A decision support system for assessing management interventions in a mental health ecosystem: The case of Bizkaia (Basque Country, Spain)
Evidence-informed strategic planning is a top priority in Mental Health (MH) due to the burden associated with this group of disorders and its societal costs. However, MH systems are highly complex, and decision support tools should follow a systems thinking approach that incorporates expert knowledge. The aim of this paper is to introduce a new Decision Support System (DSS) to improve knowledge on the health ecosystem, resource allocation and management in regional MH planning. The Efficient Decision Support-Mental Health (EDeS-MH) is a DSS that integrates an operational model to assess the Relative Technical Efficiency (RTE) of small health areas, a Monte-Carlo simulation engine (that carries out the Monte-Carlo simulation technique), a fuzzy inference engine prototype and basic statistics as well as system stability and entropy indicators. The stability indicator assesses the sensitivity of the model results due to data variations (derived from structural changes). The entropy indicator assesses the inner uncertainty of the results. RTE is multidimensional, that is, it was evaluated by using 15 variable combinations called scenarios. Each scenario, designed by experts in MH planning, has its own meaning based on different types of care. Three management interventions on the MH system in Bizkaia were analysed using key performance indicators of the service availability, placement capacity in day care, health care workforce capacity, and resource utilisation data of hospital and community care. The potential impact of these interventions has been assessed at both local and system levels. The system reacts positively to the proposals by a slight increase in its efficiency and stability (and its corresponding decrease in the entropy). However, depending on the analysed scenario, RTE, stability and entropy statistics can have a positive, neutral or negative behaviour. Using this information, decision makers can design new specific interventions/policies. EDeS-MH has been tested and face-validated in a real management situation in the Bizkaia MH system.The present research study is frameworked in the REFINEMENT Spain project (Project PI15/01986), funded by the Carlos III Health Institute (http://www.isciii.es/)
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